Sheet storing apparatus and sheet storing method

A sheet storing apparatus for storing sheets in a bag, comprising:

• a holding member configured to hold the bag;
• a storage mechanism configured to store sheets in the bag held by the holding member;
• a stage on which the bag held by the holding member is placed, the stage configured to move in a first direction and in a second direction opposite to the first direction;
• a pressing member configured to apply pressing force to the sheets stored in the held bag which is placed on the stage and to move in the first direction in which the pressing member moves from a first position toward the stage and the second direction in which the pressing member moves away from the stage;
• and
• a controller configured to control the apparatus such that the pressing member performs first compression in which the pressing member applies first pressing force to the sheets stored in the held bag and thereafter second compression in which the pressing member applies second pressing force that is smaller than the first pressing force to the sheets stored in the held bag,
• wherein
• the controller is configured to control the apparatus such that the pressing member performs the first compression when the pressing member moves in the first direction from the first position to a second position toward the stage at a third position and reaches the second position, and thereafter the pressing member performs the second compression while the pressing member moves in the first direction from the second position to a fourth position by a first distance and the stage moves in the first direction from the third position to a fifth position by a second distance that is larger than the first distance.